/**
 * Copyright (c) 2008-2010, JFXtras Group
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 * 1. Redistributions of source code must retain the above copyright notice,
 *    this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright notice,
 *    this list of conditions and the following disclaimer in the documentation
 *    and/or other materials provided with the distribution.
 * 3. Neither the name of JFXtras nor the names of its contributors may be used
 *    to endorse or promote products derived from this software without
 *    specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

package org.jfxtras.bridge;


import java.util.HashMap;
import java.util.Map;

/**
 * Helper class for converters
 *
 * @param <K> the key type
 */
public class ConverterSupport<K> {
    private final Map<K, Converter<?, ?>> converters = new HashMap<K, Converter<?, ?>>();

    /**
     * Converts the given object if there is a converter registered for the key
     *
     * @param key   the key
     * @param value the object to convert (if there is a converter for the key)
     * @return the originally or converted object
     */

    protected Object convertIfNecessary(K key, Object value) {
        Converter<?, ?> converter = converters.get(key);
        if (converter == null) {
            return value;
        }

        return ((Converter) converter).convert(value);
    }

    /**
     * Stores a converter.
     * If the converter is null, this method does nothing
     *
     * @param key       the key the converter is stored for
     * @param converter the converter
     */
    public void store(K key, Converter<?, ?> converter) {
        if (converter != null) {
            converters.put(key, converter);
        }
    }
}
